S06 ICOSANDRIA. TENTAGYNIA. 



Order III.— TRIGYNIA. 

 S39. SESUVIUM. L. 



Calioc 5-parted, coloured. Petals none. Cap- 

 sule superior, ovate, 3-celIed, opening trans- 

 versely all round, many-seeded. Seeds minute. 



Succulent herbaceous plants with opposite semiarn- 

 plexicaule entire leaves, and axillary, solitary flowers. 



Species. 1. S. sessile. Leaves spathulate,'flat; flowei*s 

 sessile, rosaceous. Hab. On the sea-coast, from New 

 Jersey to Florida. Leaves sometimes nearly linear; seg- 

 ments of the calix pointed below the summit. 



Order IV.—PENTAGYNIA. 

 S40. ARONIA. Fersoon. Mespilus. X. 



Calix 5-toothed, Petals 5. J5erri/ inferior 5 

 to 10-celIed^ cells 1 or 2-seeded. /^eet/s cartila- 

 ginous. 



Shrubs without spines, having alternate undivided 

 leaves, and flowers which are corymbose or racemose, 

 g-enerally white; fruit a small black purple or scarlet po- 

 moid berry, containing- seeds similar to those of apples. 



Stecies, 1. A. arbntifolia. Berries scarlet in co- 

 T}'mbs, astrlng"ent and scarcely eatable at any period; but 

 without any acidity, and sweetish. 2- melanocarpo. 

 Pruit also astringent and black or nearly so, but prefera- 

 ble to the preceeding. 3. Botryapium. Berries purple, 

 pruinose, very saccharine and agreeably flavoured. 4. 

 ovalis. 5. sanguinea. Ph. 6. *AlnifoUa. Smooth: 

 leaves roundish, the upper part toothed, pinnately 

 nerved, under side somewhat glaucous; raceme simple, 

 elongated; fruit black and sweet. Hab. In ravines and 

 on the elevated margins of small streams from Fort Man- 

 dan to the Northern Andes. Obs. A shrub 4 or 5 feet 

 high; leaves roundish and retuse, somewhat attenuated 

 at the base, toothed towards the summit; fruit dark 

 purple, somewhat pruinose, very agreeable and saccha- 

 rine; ripening about July and August. 



A North American genus, with the exception of 2 Eu- 

 ropean species, and 1 said to he indigenous to mount Ida 

 in Crete. 



341. PYRUS. L, (The Apple and Pear.) 



Calix 5-cleft. Petals 5, Apple large and 

 carnose, inferior, 5-cclled, Kiany-seeded, 



